Carrier 58MSA instruction manual → ÐFurnace Pressure and Drain Tubing Diagram

	TUBE ROUTING
Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below.
Condensate Trap; Factory Installed	Tube location when used in UPFLOW application		Condensate Trap on LEFT
in Blower Shelf			Side Optional
(Blower access panel removed)	BURNER ENCLOSURE		BURNER ENCLOSURE
	PRESSURE REFERENCE
			PRESSURE REFERENCE
	TUBE ASSEMBLY
			TUBE ASSEMBLY
COLLECTOR BOX TUBE	CAP		CAP
(PINK)	PLUG		PLUG
		COLLECTOR BOX TUBE
COLLECTOR BOX TUBE
	COLLECTOR BOX DRAIN	(PINK)
(GREEN)
	TUBE	COLLECTOR BOX TUBE (GREEN)
INDUCER HOUSING (MOLDED) DRAIN TUBE	(BLUE & WHITE STRIPED)		COLLECTOR BOX DRAIN TUBE
			(BLUE & WHITE STRIPED)
(BEHIND COLLECTOR BOX DRAIN TUBE)
	CONDENSATE TRAP	COLLECTOR BOX DRAIN TUBE
COLLECTOR BOX DRAIN TUBE		(BLUE)
(BLUE)
	FIELD-INSTALLED
	FACTORY-SUPPLIED	CONDENSATE TRAP
	DRAIN TUBE COUPLING
FIELD-INSTALLED	(RIGHT DRAIN OPTION)		INDUCER HOUSING DRAIN TUBE
FACTORY-SUPPLIED DRAIN TUBE
			(VIOLET)
COUPLING (LEFT DRAIN OPTION)	FIELD-INSTALLED
	FACTORY-SUPPLIED 1/2-IN.
FIELD-INSTALLED FACTORY-SUPPLIED	CPVC STREET ELBOWS (2)
	FOR LEFT DRAIN OPTION
DRAIN TUBE
Condensate Trap on	Tube location when used in DOWNFLOW application		Condensate Trap on
LEFT Side			RIGHT Side
	COLLECTOR BOX		PLUG
CAP
	DRAIN TUBE (BLUE)		CAP
	PLUGGED END		COLLECTOR BOX DRAIN TUBE
		COLLECTOR BOX DRAIN	(BLUE)
COLLECTOR BOX		TUBE
		(BLUE & WHITE STRIPED)	COLLECTOR BOX TUBE
TUBE (GREEN)
			(PINK)
COLLECTOR BOX DRAIN TUBE	PLUG
(BLUE & WHITE STRIPED)		INDUCER HOUSING DRAIN	COLLECTOR BOX TUBE
			(GREEN)
COLLECTOR BOX		TUBE (VIOLET)
			COLLECTOR BOX EXTENSION TUBE
EXTENSION TUBE
	COLLECTOR BOX		BURNER ENCLOSURE PRESSURE
			REFERENCE TUBE ASSEMBLY
CONDENSATE TRAP	EXTENSION TUBE
		DRAIN TUBE COUPLING	CONDENSATE TRAP
BURNER ENCLOSURE PRESSURE	COLLECTOR BOX
	TUBE (PINK)	DRAIN TUBES ROUTED IN	COLLECTOR BOX
REFERENCE TUBE ASSEMBLY
		FRONT OF GAS VALVE	EXTENSION DRAIN TUBE
INDUCER HOUSING DRAIN TUBE (VIOLET)			GAS VALVE

	Tube location when used on			Tube location when used on
	HORIZONTAL - LEFT application			HORIZONTAL - RIGHT application
AUXILIARY "J" BOX RELOCATED HERE		COLLECTOR BOX DRAIN TUBE	COLLECTOR BOX DRAIN TUBE		COLLECTOR BOX EXTENSION TUBE
		(BLUE & WHITE STRIPED)	(BLUE)

PLUG				COLLECTOR BOX TUBE (PINK)
CAP		COLLECTOR BOX	PLUG
BURNER ENCLOSURE		TUBE (GREEN)
PRESSURE REFERENCE
TUBE ASSEMBLY
COLLECTOR BOX		INDUCER HOUSING	CAP
		DRAIN TUBE		BURNER ENCLOSURE
EXTENSION TUBE
		(VIOLET)		PRESSURE REFERENCE
		COLLECTOR BOX		TUBE ASSEMBLY
CONDENSATE TRAP
		DRAIN TUBE (BLUE)	COLLECTOR BOX	COLLECTOR BOX
	DRAIN TUBE	COLLECTOR BOX TUBE (PINK)	TUBE (GREEN)	EXTENSION TUBE
COLLECTOR BOX EXTENSION DRAIN TUBE	COUPLING	RELOCATE TUBE BETWEEN BLOWER	COLLECTOR BOX DRAIN TUBE	CONDENSATE TRAP
		SHELF AND INDUCER HOUSING FOR	(BLUE AND WHITE STRIPED)
		040,060, AND 080 HEATING INPUT		INDUCER HOUSING DRAIN TUBE (VIOLET)
NOTE:		FURNACES

1.All tubing must be connected securely and routed to avoid kinks and traps.

2.Pressure tubing must always slope away from pressure switch to collector box connection as shown.

3.HORIZONTAL-LEFT installations require the collector box pressure tube to be relocated between the inducer housing and the blower shelf to prevent a trap.Refer to the Installation Instructions for further details.

→Fig. 8ÐFurnace Pressure and Drain Tubing Diagram

BURNER FLAME

324999-201 REV. A

(LIT. BOTTOM)

A99102

BURNER

MANIFOLD

A89020

Fig. 9ÐBurner Flame

Never use matches, candles, flame, or other sources of ignition to check for gas leakage. Use a soap-and-water solution. Failure to follow this warning could result in a fire, personal injury, or death.

18. Replace main furnace door.

SECONDARY HEAT EXCHANGERS

NOTE: The condensing side (inside) of the secondary heat exchangers CANNOT be serviced or inspected. A small number of bottom outlet openings can be inspected by removing the inducer assembly. See Flushing Collector Box and Drainage System section for details on removing inducer assembly.

Step 5ÐFlushing Collector Box and Drainage System

1.Turn off gas and electrical supplies to furnace.

2.Remove main furnace door.

3.Disconnect inducer motor and pressure switch wires or connectors.

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